If mandated training were ever imposed, legislators would continuously raise the costs to make it harder and harder for the average person to be able to afford it. They would also continue to raise the standards in order to make them unattainable. And yes there would be some instructors that would be all in favor of the price increases.
I think in most states that require training the legislature doesn't set the price, the instructors do... having said that, when you "have" to get training, that forces people into the classroom and the market forces at play probably lead to higher prices in some cases, or lower quality instruction in others. People who want to seek training from the myriad of other ways, DVD courses, experiences friends, parents, etc, all forced to use the services of a private company.
I also believe that government mandated training, in the long run, decreases the quality of training and takes the motivation and focus away from the content and knowledge to be gained, and instead the training just becomes "checking the box". Just a b.s. requirement in order to get a permit.
I think when people buy training voluntarily, they'll go for quality first. When people buy mandated training, they'll go for the cheapest in order to "check the box" and qualify for a permit. Instructors will begin to build classes focused on minimum government requirements with the least cost on the instructors part to attract participants.
Government mandated training would also send the wrong message that once you have enough training to "check the box" on your application for a permit, you've got the training you need, rather than getting the mindset of people that continuous education and improvement should be the goal.
People will get out of training what they put into it.
Think about it... Wisconsin requires 30 hours of certified classroom instruction, 6 hours of driving behind the wheel with a certified instructor and 6 hours of observation of another driver behind the wheel with a certified instructor...
Yet one need only look out your car window and see that alone does NOT prepare people for what they will face out in the 'real world' driving.
How could an 8 hour course possibly teach people all they need to know about using a firearm for self-defense. Its meaningless typical government feel-good 'symbolism over substance' measure.
We should be instilling in people a personal value of training. continuous training. We shouldn't be distracted with what silly symbolic requirement a legislature may want to tag onto your RIGHT to keep and bear arms.
Training GOOD. Government mandated training BAD.
If the government gets involved in mandating training, quality will go down, price will go up and the mindset of the general public will be further conditioned to live by the nanny-state government-telling-you-everything instead of a more self-aware and accountable responsibility to better yourself because you have an inherent understanding of the reasons for doing so.